In order to study the spatial and material qualities of wireless networks, we built a WiFi measuring rod that visualises WiFi signal strength as a bar of lights. When moved through space the rod displays changes in the WiFi signal. Long-exposure photographs of the moving rod reveal cross sections of a network’s signal strength.

The stronger the signal strength, the more lights that illuminate in that specific spot, updating as the walker/carrier moves. Then using long-exposure photographs, the lights are recorded for beautiful results. Super simple concept, yet very effective. See the device in action in the video below.

What is interesting to me is the degree of spatial variability of a single network’s signal strength. I also wonder if charting the same network over the same ‘path’ at different times would show variability; hinting at other variables affecting signal strength. Really interesting concept and a great visualisation.